Gas burner



g. 11, 1931. l. c. HUGHES 1,818,222

GAS YBURNER Filed March 21, 1929 2 sheets-sneet 2 P611/ C Hughes 0 J INVEN'roR Eig. 7 FY 71m.. da j ITTHRNEY Patented Aug. 11, 1931 PATENT OFFICE PAUL C. HUGHES, OF TULSA, OKLAHOMA GAS BURNER Application filed March 21, 1929. Serial No. 348,903.

This invention relates to gas burners for use in connection with the fire boxes of turnaces, stoves and ranges.

A primary object of the invention is to so construct a burner of this character that it may be easily installed in heaters the doors of which are too small to admit the passage of the burner as a whole.

Another object of the invention is to prow vide a burner of this character so constructed that a. dual colored flame of high eiiiciency will be produced and the iame outlet area of which is so graduated that back flash is prevented.

Another object of the invention is to so construct a burner of this character that it may be of any desired' configuration and which is equipped with adjustable burner units interchangeable for use in connection with any shape of burner.

Another object of the invention is to provide a lburner having a plurality of burner units, each of which is equipped with flame ports so constructed that the dropping of rust, dirt and other foreign matter into the expansion chamber is prevented.

In carrying out these objects, the inven tion is susceptible of a wide range of modiication without departing from the spirit or sacrificing any of the advantages of the claimed invention; there being shown in the drawings for illustrative purposes a preferred and practical form, in which:

j Figure 1 represents a perspective view of B5 a circular burner embodying this invention with two of the burner units removed.

Fig. 2 is a similar view showing a straight burner constructed in accordance with the invention with the valve assembly removed;

Fig. 3 is a longitudinal section partly in eleva-tion showing the valve assembly which is used in connection with the straight burner;

Fig. 4 is a perspective view partly in section of the body of afstraight burner with one of the mixing tubes shown attached;

Fig. 5 is a perspective view showing a detail of a mixing tube with a fragment of a burner unit attached;

Fig. 6 is a perspective view with parts broken out and in section of one of the burner units with its top shown open and arranged in juxtaposition ready for assembly; and

Fig. 7 is a vertical longitudinal section through one of the burner units and the mixing tube with the body structure of the burner shown in transverse section.

v In Fig. 1 an annular burner l is shown made in the form of a hollow metal casing 2 substantially inverted U-shaped in cross section and provided around the periphery thereof with a plurality of openings 3 in the outer wall thereof which merge at their upper ends into circumferentially extending slots 4 which are designed to receive mixing tubes 10 whereby the burner units are con nected with the body ot the burner. Any desired number of these units may be employed according to the size of the burnerto be constructed and as shown in Fig. 1 six of such units are illustrated and the openings provided for two others which have been removed, and which are connected by the mixing tubes 10'with the burner body or shell 2 and numbered 15, all of them being constructed exactly alike hence one only will be described in detail.

Located within the shell 2 of the burnery body l is a gas pipe 5 designed to be connected by a branch 6 with a gas main and which is equipped with a plurality of jet openings 7 in its outerywall one of which is arranged opposite each of the mixing tube receiving openings 3 and is shown clearly in Fig. 1. Around the gas pipe 5 in the casing 2 is an air chamber 8 which is supplied through the open bottom of the casing 2.

Each mixing tube 10 comprises a body 11 shaped to conform to a chamber 16 in the burner unit and which is designed to be entered through an opening 17 in said unit as is shown clearly in Fig. 6. The outer end ot the tube 10 has an upstanding T-shaped head 12 designed to fit in a slot 4 of the burner body whereby said tube is securely connected with said body, the bore 13 of the tube being arranged opposite the gas jet 7 in the pipe 5 so that the combined air andgas will be fed through the tube 10 to the burner units.

Each burner unit 15 is shown substantially in the form of a rectangular hollow box with a horizontal partition 18 extending longitudinally thereot= from the top of the opening 17 and terminating short at its rear end of the end wall of said casing. rllhis partition forms between it and the bottoni of the burner unit body a compartment 16 to receive the mixing tube 10. It is thus seen that these tubes 10 are adjustable relatively to the burner unit so that the burner units may be disosed closer to or further away troni the Eody of the burner 1 as may be desired. Each burner unit 15 is provided with a removable top 19 around the edges et which are formed downwardly inclined notches Q0 which form when the top is in closed position flame ports through which the juel 'from the interior of the burner unit escapes and at which point it is lit to form the llame. These flame ports 20 being arranged in the vertical sides and ends of the burner units and inclined nshown .preverntgthe famine; ot Vrust dirt and other foreign matter into the eX- pansion chamber.

Depending from the inner orlower face of the top 19 is a fin Q1 here shown made substantially triangular in 'forni with an aperture 22 extending through its apex to receive a pin Q3 which is also extended transversely throngh apertures 24E formed in the opposed side walls of the bnrner unit and by means of which the top 19 is securely connected with the body ot the unit.

It will be obvious that the head 12 of the mixing'tube or pipe 10 is shaped toconieorm in the sidewall ot the burner to the openingr casing l's'othat'when the pa a loose fitwill be insured to provide for ready removal of `the tube `when desired. As here shown this opening?r is substantially U-shaped in form and ,the head lZ is correspondi M shaped as shown in Fio. 5 to lit -therein. When the mixing tube is in position it receives the liet ot fuel directly in the' center of the open -end of the tube, thus av idinfj; all danger of lealrage'around outside et ti1 Inthe Ytoirnshown in Fing. 9, the burner in stead o tbeineround is ,-stantiallyoblong` or rectangular in general contour the shell or casingr 2a thereot` being' in the Jform of an elongated rectangular box open at its bottom to provide for the entrance of air tothe chamber-80, and in which mounted the-gas supply pipe 5a here shown hxedly coiniected with the side walls of thecasing` 2a by means of integral lugs or fins 9.5. This-rectangular casina)r 2a as shown clearly in Fig. 4 is provided at its opposite sides with openings 3ft corresponding to those, 3. shown .in the other form of the invention and which are de ned to 4receive heads 12 to the mixing pipes l() car riedby the burner unitsn it beine' obvious that these lnixingheads and pipes arethesamein both forms of the invention and may be used for connecting the burner units which are also the same with any shape burner casing, provided such casing be equipped with the openings to correspond to the shape ot the head 12 of the tube 10.

The burner shown in Fig. 2 is constructed alongl the same general lines that shown in Fig. 1 except that the conliguration ot' the casing is diliereut, the burner 4units and the mixing` tubes beingl the same.

The gas supply pipe 5a shown in Fics. 2, 3, and 4: iu cminection with the straight or rectangular burner casing is internally threaded at one end as shown at 25 to receive the valve bushing` 27 which is located at one end oi' the Aas supply pipe while at the other end thereoil is the valveseat ittingfl the seat- 29 of which is designed to `receive `the needle valve 3() operable by means of a hand wheel 81 carried by the outer end ot the valve stem'4 32 and which controls the amount otgas admitted to the pipe 5a from the gas main, .the connecting' pipeof which is shown at 410.

This valve assemblyV ywhich controls V:the admission ot to the .burner easing or rather to the pipe 5a .in said casing,` through which pipe it is discharged to the mixing tube 1() through the apertures .7 (1 is also designed tor use in connection with the supply pipe (i ot the circulai` burner l, it beingrunderstood that theshape of this assembly isinade to contorni to such uses.

From the above description vit will be seen that the mixing` tubes 10 are all detachable from the burner units and from the burner casing' and that they are adjustalfile relatively to the burner units to adapt -the burner to fit boxes of dilterent sii/les. Y liloreover the connection et `the 4burner unit by the mi, ingr tube with the burner casina' novides for Lthe units beine' interchangeable for use in connection witheither stra ight, circular, or other shaped burner casings.

It is also to be understood that any desired number et units maybe employed Iin connec tion with the burner, eiarhtbeing` here shown in hothforms ot v,the invention illustrated.

It is also to be understood that the means of supplying;` air-to these burners is the simpleexpedient ofiadmitting` air to the base or ash pit of a 'heater in connection with which the burner is used, the use of an ordinary stack damper beingthe 4only ineansfo regnlationneeded .in this connection.

In .the installingof a burner constructed in accordance with .this invention'obviously it may be `disassembled andthe casing first mounted in the flire boxy and `then .the finixing tubes and the burner unit assembled by inserting' them tlirouchthe doors of the furnace or other heater which whileadmitting the passage ot the individual units would :be too small for the burner if the parts were made integral. Moreover this separation of the parts provides for the repair and renewal of the :individual `elements when necessary and lll) in which all parts are instantly accessible for cleaning or service.

The burner units 15 each has within it an expansion chamber 33 into which the air and gas mixture is entrained through the mixing tube and finally issues out of the ame ports 2O of the top of the burner unit where it is ignited and produces a dual colored flame of highest efficiency and owing to the graduated outlet area of the flame ports back flash is prevented.

A burner constructed as herein shown and described has practically no carbon formed therein, is efficient in the generation of heat, economical in the consumption of fuel, being simple and durable in construction, and is inexpensive to manufacture.

lithout further description it is thought that the features and advantages of the invention will be readily apparent to those skilled in the art, and it will, of course, be understood that changes in the form, proportion and minor details of construction may be resorted to, Without departing from the spirit of the invention or its scope as claimed.

I claim:

l. A burner of the class described comprising a burner body, in the form of a hollow casing open to the atmosphere, a gas supply pipe mounted in said casing having outlet apertures arranged at intervals, said casing having openings positioned opposite said aperture, mixing tubes having T-shaped heads to be detachably mounted in said casing openings, and having bores arranged opposite the discharge apertures of the gas pipe, and a burner unit connected with each mixing tube.

2. A burner of the class described comprising a burner body in the form of a hollow casing open to the atmosphere, a gas supply pipe mounted in said casing having outlet apertures arranged at intervals, said casing having openings positioned opposite said apertures, the upper walls of said openings having lateral slot-like extensions, mixing tubes having upstanding T-shaped heads to be mounted in said casing openings and interlockingly engage said lateral extension, said tubes having bores arranged opposite the discharge apertures of the gas pipe.

3. A burner of the class described comprising a burner body in the form of a hollow casing open to the atmosphere, a gas supply pipe mounted in said casing having outlet apertures arranged at intervals, said casing having openings positioned opposite said apertures, the upper walls of said openings having lateral slotlike extensions, mixing tubes having upstanding T-shaped heads to be mounted in said casing openings and interlockingly engage with said slot extensions, said tubes having bores arranged opposite the discharge apertures of the gas pipe and a burner unit adjustably mounted on each of said mixing tubes and into which the tubes discharge.

4. A burner of the class described comprising a hollow annular body with spaced openings in the outer wall thereof, said body being open to the atmosphere, a gas supply pipe mounted in said body and having outlet apertures arranged opposite the openings in the body, mixing tubes to be mounted in said body openings, said tubes and body having elements for interlocking engagement to detachably connect the tubes to the body, the bores of the tubes being arranged opposite the discharge apertures of the pipe, and a burner unit carried by each of said mixing tubes.

PAUL C. HUGHES. 

